There are several ways to force the installation wizard on our Macs, and one of them is through an AppleScript programmed specifically for it, which It will give us the possibility to recreate the user on our Mac and clean it inside as it should be.
This AppleScript has been created by a user of Mac OS X Hints, and has made available to all a direct download link that we thank you infinitely.
From what you already know, if your Mac is weird, slow, or you have to clean, consider the option of forcing the installation wizard… Although I would start from scratch.